FreeCalypso > hg > freecalypso-hwlab
diff doc/FTDI-EEPROM-tools @ 74:0514e3520be3
doc/FTDI-EEPROM-tools: update for current state of FT232R support
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 16 Sep 2020 23:19:50 +0000 |
parents | 311c800268b8 |
children | df4bf4e06221 |
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--- a/doc/FTDI-EEPROM-tools Thu Jul 30 05:12:44 2020 +0000 +++ b/doc/FTDI-EEPROM-tools Wed Sep 16 23:19:50 2020 +0000 @@ -19,20 +19,25 @@ Some work has also been done toward the goal of being able to program the internal EEPROM in FT232R chips (a very popular single-channel USB to UART -converter needing no external components), but this work has not been finished -yet, and the present tools should NOT be used to attempt an EEPROM write on -that chip - the risking of bricking the chip is too high. +converter needing no external components), but this work should be considered +experimental: the tools appear to work on an UB232R module from Digi-Key +(presumably containing a genuine FT232RQ chip) and on a no-name FT232RL adapter +where the chip is uncertain, but because we have no real production use case +yet, we are not ready to truly vouch for FT232R support. + +More generally: -More generally, our fteeprom-read tool should be able to read out the EEPROM -content from just about any FTDI chip including FT232R, whereas our -fteeprom-prog tool should be able to program a user-supplied set of bits into -any FTDI+EEPROM combo where the EEPROM is a separate chip - but it is NOT safe -to use on FTDI chips like FT232R or FT-X that have their EEPROM built in. -Furthermore, if the goal is to generate a new EEPROM config from scratch, as -opposed to restoring a saved backup, we currently have generators only for -FT2232C/D and for FT2232H. (We also have a generator program for FT232R, but -it is of no use for as long as fteeprom-prog is not safe to use on FT232R -chips.) +* our fteeprom-read tool should be able to read out the EEPROM content from + just about any FTDI chip; + +* our fteeprom-prog tool should be able to program a user-supplied set of bits + into any FTDI+EEPROM combo where the EEPROM is a separate chip, or into FT232R + internal EEPROM - but it most likely won't work for newer FT-X chips; + +* if the goal is to generate a new EEPROM config from scratch, as opposed to + restoring a saved backup, we currently have generators only for FT2232C/D, + for FT2232H and for FT232R, with the last one considered experimental and not + proven. libftdi dependency ==================